Manufacture of lampblack and colophane



E. CLARK. PRooBss oF MANUFAQTURING LAMP BLACK AND GOLOPHANE.

No. 6,001. Patented Ja.11.2, 1849.

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EDWARD CLARK, OF BROOKLYN, NEW' YORK.

MANUFACTURE OF LAMPBLACK AND COLOIHAN.

Specification of Letters Patent No. 6,001, dated January 2, 1849.

To all whom t may concern: y

Be it known that I, EDWARD CLARK, of Brooklyn, in the county of Kings and State of New York, have invented a new and useful improvement in the process of manufacturing lampblack and colophane from common rosin or colophon andl calcining the lampblack, and that the following is a full, clear, and exact description of the principle or character which distinguishes it from all other things before known, and of the manner of making, constructing, and using the same, reference being'had to the accompanying drawings, making part of this specification, in which- Figure l represents a longitudinal ver tical section of the apparatus employed in the process as impro-ved by me, and Fig. 2,

a vertical section taken at the line (X X) of Fi l.

'Ihe same letters indicate like parts in all the figures. Y

The nature of the first part of my invention consists in producing by one and the same operation lampblack and colophane by the distillation or decomposition of common rosin in heated iron retorts, and by the infiaming of a part of the products of the distillation to produce the lampblack, and thus leave the other constituent or portion of the substance to distill over in the form of colophane. Y

The second part of my invention which relates to the apparatus in which I apply my improved process, consists in combining the chamber in which the lampblack is deposited, and the colophane receiver with the retort in which the rosin is decomposed, when the said retort is provided with a beak having burners for the burning of the inflammable gas evolved to Aproduce the lampblack, and a pipe through which the colophane is conducted or delivered into the receiver. vention consists in combining with the burners on the beak of the retort in the lampblack chamber a rotating hollow cylinder into which lampblack can be placed to be calcined. Y

The apparatus which -I employ for the application of'my improved process is the common iron retort (a) of the accompanying drawings, such as is used for making illuminating gas (but any other form may A And the last part of my inbe substituted); it is set iin masonry over a furnace (b) that heat may be applied to it regularly. Atthe forward end it is providecl with a movable cap (c), and, at thev rear end with a neck or beak (cl) that opens into a chamber (e) 'in which the lampblack is collected. The neck of the retort is somewhat elongatedk and at the outer end provided with burners (f) (air being admitted c tothe chamber (e) for the combustionin any desired manner) assembling gas burna receiver (7L) to collect the colophane which is the residuum of the distillation of the rosin. The lampblack chamber (e) and the colophane receiver (h) should be quired heat for calcining lampblack placed i 'er s,`but`larger;' andit is further provided. with a branch pipe (g) that runs down intol within the cylinder as it rotates. The cylinder is provided with journals at each end that run in suitable boxes, and one end of the cylinder may if desired pass out `through the wall of the lampblack chamber and may there be provided with a lid l(Z) vin the usual Way or in any desired manv ner for the purpose of introducing the lampblack and removing it when calcined this making no part of my invention. One I ofthe journals of the said cylinder is provided with a pulley (m) to receive a bandl from any first mover by which the cylinder is rotated byy a slow motion duringthel process of ealcining.

Y 'My process is conducted in the following manner: The rosin in lumps or in the melted state is put in the funnel where the heat from the retort keeps it in the required fluid state, and the cock (j) being opened, itfalls onto the heated surface of the retort (a) and is decomposed, a portion rising in the form of vapor or inflammable gas,

deposited on the floor and walls of the chamber (e) in the same manner as in the well known process of making lampblack,

and is afterward collected and removed But that portion ofV in the usual manner. the rosin which does not inflame during the operation passes out through the pipe (gi) of the retort into the receiver (72,) from which it is to be drawn in any desired manner. The quality of the colophane thus produced, (a substance well known to chemists and which therefo-re needs not toI be described), will depend on the heat o-f the retort during the process, the lowest temperature at which volatilization takes place producing colophane of a pure amber color, and at a higher temperature of a dark brown o-r black color. Vhen the rosin is admitted to the retort, it (the retort) is not .to contain coal or other carbonaceous matter, although lumps of iron or other conductor of caloric may be placed in the retort for the purpose of increasing the heating surface.

ceiver with the retort, provided with the burners for inflammation, and the pipe for thedelivery of the colophane, substantially as herein described. And finally, I claim the hollow cylinder for the calcination of lampblack in combination with the burners in the lampblack chamber, substantially as described.

` lEDWARD CLARK.

Witnesses A. P. BROWNE, CHS. M. KELLER. 

